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The default-on duplicate handling can hide valid memories from default retrieval. That happens when similar status records or existing merged rows are wrongly marked as superseded. Selecting an entity in the panel can show a different same-named entity. Fix these before merging. The read-only dry-run script should also refuse to overwrite its input database and should write reports with owner-only permissions.
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Reviewing files that changed from the base of the PR and between 9beec0a and 098b8ce.
Files selected for processing: 22
dsh-mneme/CHANGELOG.md
dsh-mneme/docs/CONFIGURATION.md
dsh-mneme/docs/ENTITIES.md
dsh-mneme/lib/client.js
dsh-mneme/lib/config.js
dsh-mneme/lib/entities/extractor.js
dsh-mneme/lib/lang.js
dsh-mneme/lib/service.js
dsh-mneme/lib/settings.js
dsh-mneme/lib/store.js
dsh-mneme/lib/summarize.js
dsh-mneme/scripts/cross-type-dedupe-dryrun.mjs
dsh-mneme/src/config.js
dsh-mneme/src/entities/extractor.js
dsh-mneme/src/lang.js
dsh-mneme/src/service.js
dsh-mneme/src/settings.js
dsh-mneme/src/store.js
dsh-mneme/src/summarize.js
dsh-mneme/test/api.test.js
dsh-mneme/test/entities.test.js
dsh-mneme/test/summarize.test.js
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Review comment at @dsh-mneme/CHANGELOG.md at line 5:
第 5 行关于关闭去重开关后“与加开关前行为逐字节一致”的说明范围过宽。修改 CHANGELOG 中该回滚说明，限定为关闭后不执行批内跨类型去重且审计键不出现，并明确 `codingSummary` 提示词不受该开关控制，新增约束仍然生效。
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const dims = new Set([...byType.values()].flat().map((r) => r.vec.length));
if (dims.size > 1) {
// Two embedding generations in one library means cross-generation cosines are
// meaningless; say so instead of producing a number nobody should trust.
throw new Error(`library holds mixed embedding dimensions (${[...dims].join(", ")}); refusing to compare across them`);
}
++const models = new Set(rows.filter((r) => r.vec).map((r) => r.embedding_model ?? null));+if (models.size > 1) {+ throw new Error(`library holds vectors from mixed embedding models (${[...models].map(String).join(", ")}); refusing to compare across them`);+}
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Review comment at @dsh-mneme/scripts/cross-type-dedupe-dryrun.mjs at line 146:
更新查询以读取 embedding_model，并在维度检查后、余弦比较前检查有向量的行是否包含多个模型标识；若存在多个标识则拒绝比较。将 NULL 视为一种模型标识，使遗留行与其他模型向量共存时也会触发拒绝。
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Review comment at @dsh-mneme/scripts/cross-type-dedupe-dryrun.mjs at line 212:
更新报告写入处的 writeFileSync：以排他创建方式写入，避免截断已存在文件；同时在扫描前检查报告输出是否与输入数据库指向同一文件，并在相同时拒绝运行。检查需识别路径别名，不能只比较路径字符串。
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Review comment at @dsh-mneme/scripts/cross-type-dedupe-dryrun.mjs at line 212:
更新写入 report 的 writeFileSync 调用，使用仅所有者可读写的权限创建报告，并采用独占创建方式，避免复用权限未知的已有文件；保留现有报告内容和 UTF-8 编码行为。
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Review comment at @dsh-mneme/src/settings.js at line 400:
请先确认 summarizeBatchCrossTypeMinSim 的预期配置方式：若应可在设置面板调整，将其加入 FEATURE_NUMBERS 并确认数值行渲染路径支持该键；若按现有约定仅通过配置文件调整，则修正对应注释，移除可在面板调阈值的承诺。
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Review comment at @dsh-mneme/src/store.js at line 4755:
修正 store.js 中按 last_seen 选取同名实体的查询，使指定类型时只匹配该类型，并让服务端 findEntityByName 接收并使用可选类型参数；面板目录行点选和“在图谱中查看”应保存所选实体类型，在 load 与属性请求中传递该类型，高亮同时比较名称和类型。同步处理 api.js 的 entity-attrs 路由；graphFocus 等未指定类型的入口仍保留跨类型查找。
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service 的两个透传接口也允许这个调用序列。请让创建和查找使用相同的空白规则，并覆盖这些字符的往返查找。
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Review comment at @dsh-mneme/src/store.js at line 4756:
统一 createEntity 与 findEntityByName 的名称空白规范化规则，避免创建和查找对制表符、换行符等字符处理不一致；确保经 service 透传的调用也使用相同规则，并覆盖这些字符的创建后往返查找。修改相关参数构造或规范化逻辑，不要依赖 SQLite 单参数 trim() 处理制表符和换行符。
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Major · Data Integrity & Integration · Quick win
不要把版本或时间不同的状态快照直接判为重复。
例如，同一窗口产出 history 和 project，正文分别为： The production deployment for the payments service is running release 1.2.3 with all health checks passing.
和仅将版本改为 1.2.4 的文本。两条正文通过长度检查，bigram 相似度也超过 0.85。由于长度相同，规划器保留较早的条目，并取代另一条。
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Review comment at @dsh-mneme/src/summarize.js around lines 110 - 111:
更新 summarize.js 中基于 textSimilarity 和 minSim 的重复判定：自动取代前检查两条记录中的版本、关键数值及时间是否存在差异；无法确认状态等价时保留双方，不要仅凭相似度或长度选择一条。
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Review comment at @dsh-mneme/src/summarize.js around lines 120 - 121:
更新规划器中处理 `retired` 和相似度候选项的逻辑，单独记录已选为胜者的索引，并阻止这些索引随后成为败者，以避免生成多层取代链；保留现有的已退休条目检查，并为按顺序接受 `0 → 1`、`1 → 2` 的场景补充回归测试，确认不会生成第二条取代关系。
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Review comment at @dsh-mneme/src/summarize.js at line 1420:
更新 idByWriteIndex 的写入条件，只将 saveWithDedupe 返回 action 为 created 且包含 memory.id 的结果纳入批内取代计划；不要纳入 action 为 merged 的既有行，保留后续取代流程不变。
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这两条 issue 是同一个根病：把「类型」当成了「对象身份」
sim>=0.85的 81 对近重复中 72 对跨类型。四处夹缝：src/lang.js的codingSummary让模型「宁可拆成多条」（pitfall与constraint本就是同一结论的两种写法）；src/service.js:1480的findSessionDuplicate锁同类型同会话；src/dream/clustering.js:117首行if (memories[i].type !== memories[j].type) continue;；dream 巩固提示词也写着「仅合并同类型」。WHERE name = ?。改法
#687 不开常开类型闸。 本机活跃库 9,275 条带向量的记忆里跨类型
cosine>=0.90共 45 对，逐对读正文后 36 对（80%）确为同义，9 对合并会丢信息（5 对时间序列/状态快照、2 对症状 vs 修复、1 对结论反转、1 对版本号不同）——「跨类型高相似就合并」每 5 对吞 1 对，而这类对只占活跃总量 0.97%，风险不对称。落三层：codingSummary提示词（zh/en）补互斥约束：同一结论只记一条，pitfall/constraint不双写，时间序列写进同一条。pitfall↔constraint、history↔project两组生效。纯函数planBatchCrossTypeDedupe：按相似度降序、每条最多被退休一次、不许链式藏行；门槛textSim>=0.85（词面重合是这两组的主特征，不用余弦）、长度 ≥24 字、长度比 ≥0.5。store.supersedeChain只写superseded_by/superseded_at：保留正文更全的一条，被取代者正文零改写、不归档、不 merge。判错可回退，且supersededIds()的JOIN ... AND w.archived=0让继任者被归档时旧行自动回可见。默认开（2026-11-13 拍板）：开关存在的意义是让新写入不再双录，默认关等于修了不生效；设
false是 kill switch，关时审计行的batchDeduped/batchPairs两个键根本不出现，行为与加开关前逐字节一致。两个键已登记进settings.js的面板白名单。#688 只改写入侧，存量不动。 实体 id 是
randomUUID()，合并要重指 59,715 行关系且entity_relations无唯一约束，中断会造重复边，收益 0.68% 不值得。改：findEntityByName改为lower(trim(name))+type的等价比较并建表达式索引；createEntity落库只去首尾空白、保留大小写用于展示、不剥版本号（DeepSeek-V3/V4是两个对象）。类型维度不能省——去掉它会误并 95 组。顺带删掉
entities.canonical_memory_id：v0.7.1 引入的预留列，src/store.js里只有 DDL/行映射/INSERT/UPDATE 四处 plumbing，没有任何调用方写它或读它，25,474 行全 NULL。幂等迁移，宿主 SQLite 3.51.3 支持DROP COLUMN。存量 17 对不由代码处置
新增只读
scripts/cross-type-dedupe-dryrun.mjs（输出禁止落在仓库内，清单含记忆原文），复核后由人按纯 SQL 打链。如实记一处两份尺子：dry-run 那 17 对是按
cosine>=0.90挑的，线上规则判textSim>=0.85，报告textSimBands=0.9-1:1 / 0.8-0.9:2 / 0.7-0.8:3 / 0.6-0.7:5 / 0.5-0.6:6—— 这 17 对里只有约 1–3 对会被线上规则真认出来。存量清单不是「新规则会抓到什么」的证据，线上规则偏保守是设计。测试
check-sync✓125，改动模块的src/libindex blob 逐字节一致createStore396ms（含表达式索引），二次 24msfalse→ 2 红；MIN_SIM降到 0.5 → 2 红；去掉 type 维度 → 1 红；lower(trim())改回精确匹配 → 2 红Ref #687, #688（存量的数据面处置与 issue 收尾不在这个 PR 里）
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